A good place to farm glands is at the Fetid Pool, near Legion Hold. Here Mutant Horrors drop glands and are close to each other, making AOE a viable option to quickly get your 12 glands.

This quest can be completed in a group as long as all players are in range of the camp being poisoned when the mutton is dropped. Only 12 or so glands need to be looted group-wide, so this will lessen the pain of the quest. It is advised that someone in the group has a spare gland or two in case one of the camps inevitably bugs.

The Dragonmaw Peon camps on the Netherwing Ledge can bug out on occasion. Be certain to only use the mutton near camps where at least 2 non-disobedient peons are actively mining.

It should be noted that though the poisoned mutton will attract the entire "pull" of peons, only one will count towards the quest.

The Dragonmaw have peons stationed at nearly every crystal formation up here. While the outright slaying of them would draw far too much unwanted attention to you, there is a way that we can thin their numbers and remain below the suspicious eyes of Mor'ghor.

Venture into the wilds of Shadowmoon Valley and slay the tainted wildlife. Take from them their corrupt fel glands. Use those fel glands with this mutton that I'll give you near the peons. They'll take one bite and fall deathly ill!